Life Spans of Lehi's Lineage Welch, John W., and Greg Welch. Life Spans of Lehi's Lineage. Provo, UT: Foundation for Ancient Research and Mormon Studies, 1999.
Longevity of Book of Mormon People and the "Age of Man" Welch, John W.. "Longevity of Book of Mormon People and the "Age of Man"." The Journal of Collegium Aesculapium 3 (1985): 34-45.
Life Spans of Alma's Lineage Welch, John W., and Greg Welch. Life Spans of Alma's Lineage. Provo, UT: Foundation for Ancient Research and Mormon Studies, 1999.
I Have A Question: What were the ages of Helaman’s ‘stripling warriors’? Tvedtnes, John A.. "I Have A Question: What were the ages of Helaman’s ‘stripling warriors’?" Ensign 22, no. 9 (1992): 28.
Chapter LV Reynolds, George. "Chapter LV." In The Story of the Book of Mormon, 302-307. Salt Lake City: Joseph Hyrum Parry, 1888.
Why did Adam and his descendants live so long? Valletta, Thomas R.. "Why did Adam and his descendants live so long?" Ensign 24, no. 2 (1994): 61-62.
